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Impulse Aging Behavior of ZnO–V 2 O 5 ‐Based Varistors withNb 2 O 5 Addition
Author(s) -
Nahm ChoonW.
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04420.x
Subject(s) - varistor , materials science , impulse (physics) , doping , voltage , clamp , composite material , optoelectronics , electrical engineering , computer science , physics , clamping , quantum mechanics , computer vision , engineering
The effect of Nb 2 O 5 addition on impulse aging behavior of ZnO–V 2 O 5 –MnO 2 –Co 3 O 4 –Dy 2 O 3 ‐based varistors was investigated. The varistors doped with 0.25 mol% Nb 2 O 5 exhibited the best clamp characteristics, in which the clamp voltage ratio was in the range of K =1.65–2.50 at an impulse current of 1–50 A. The varistors doped with 0.1 mol% Nb 2 O 5 exhibited the best electrical stability by marking %Δ E 1 mA =−1.0%, %Δα=−2.8%, and %Δ J L =31.5% after applying the impulse current of 100 A.